Switched-access system for testing circuit legs such as communication lines



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Aus. 25, 1970 G. A. BARBARY ET AL 3,525,822

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Aug. 25, 1910 G. A. BARBARY ET AL 3,525,822 swITcHED-Accnss SYSTEM Fon TESTING CIRCUIT LEGS SUCH AS COMMUNICATION LINES Filed Jan. 17, 1968 125 Sheets-Sheet 4 Aug. 25', 1910 csv/A BARBARY ETAL 3,525,822 SWITCHEDACCESS SYSTEM FOR TESTING CIRCUIT LEGS SUCH AS COMMUNICATION LINES 123 Sheets-Sheet Filed Jan. Il?, 1968 Aug. 25, 1970 G. A. BARBARY ET AL 3,525,322

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Aug. Z5, 1970 G. A. BARBARY ET AL SWITCHED-CCESS SYSTEM FOR TESTING CIRCUIT LEGS SUCH AS COMMUNICATION LINES Filed Jan. 17, 1968 123 Sheets-Sheet l 1 W 1v1 lmllIllnI QI?- TT \m 5S 2:. \V TS V f` VN Tjm: Q :T: ;wnm: :39-352 9 @da 52.302 Y. 2 2 da S @il l. il. E.; x 4 l\ n Tm L: :3-2; TN mlz: Q: 52 E .JITIIN m E E 2 5 \l x y :A 0E om J Tzm: ojw: :iw: N: am OTSUQ 832-209 OTWGQ 252-302 m32: Sem: 82: 2E: 22E f i, n Vr* n u wm Nv: NTQO: 2:90am: m: :Em: H. .bt HV1 002/ Aug. 25, 1970 G. A. BARBARY ET Al. 3,525,822

SWITCHEDCCESS SYSTEM FOR TESTING CIRCUIT I LEGS sucu Ns COMMUNICATION LINES /IZOZ Aug. 25, 1970 G. A. BARBARY ET AL SWITCHED-ACCESS SYSTEM FOR TESTING CIRCUIT LEGS SUCH AS COMMUNICATION LINES Filed Jan. l?, 1968 125 Sheets-Sheet l5 Aug. 25, 1970 G. A. BARBARY ET Al- 3,525,822

SwITCHED-'ACCESS SYSTEM FOR TESTING CIRCUIT LEGS SUCH AS COMMUNICATION LINES Filed Jan. 17. 1968 123 Sheets-Sheet 14 Aug. 25, 1970 G. A. BARBARY ET AL 3,525,822

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Aug. 25, 1970 G. A. BARBARY ET AL 3,525,822

E13-ACCESS SYSTEM FOR TESTING CIRCUIT SWITCH LEGS SUCH AS COMMUNICATION LINES Filed Jan. 17, 1968 125 Sheets-Sheet 16 G. A. BARBARY ET AL SWITCHED-ACGESS SYSTEM FOR TESTING CIRCUIT Aug. 25, 1970 LEGS SUCH AS COMMUNICATION LINES Filed Jan. 17, 1968 123 Sheets-Sheet 17 Aug. 25, 1970 G, A, BARBARY ET AL 3,525,822

SWITCHED-ACCESS SYSTEM FOR TESTING CIRCUIT LEGS SUCH AS COMMUNICATION LINES Filed Jan. 17, 1968 125 Sheets-Sheet 18 IBI G. A. BARBARY ET AL 3,525,822 SWITCHED-ACCESS SYSTEM FOR TESTING CIRCUIT LEGS SUCH AS COMMUNICATION LINES 1968 125 Sheets-Sheet 19 Aug. 2s, 1970 Filed Jan. 17,

Aug. 25, 1970 G. A. BARBARY ET AL 3,525,822

SWITCHED-CCESS SYSTEM FOR TESTING CIRCUIT LEGS SUCH AS COMMUNICATION LINES 125 Sheets-#Sheet 2O Filed Jan. 17, 1968 

